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Full text of "IS 2000-1: Methods of chemical analysis of bauxite, Part 1: Determination of loss on ignition"

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IS 2000-1 (1985) : Methods of chemical analysis of bauxite, 
Part 1: Determination of loss on ignition [MTD 13: Ores and 
Raw Materials] 




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PROTECTED BY COPYRIGHT 



rs :2000( Part 1 ) - 19B5 

(Reaffirmed 2001) 

Indian Standard 

METHODS OF 
CHEMICAL ANALYSIS OF BAUXITE 

PART 1 DETERMINATION OF LOSS ON IGNITION 



(First Revision) 



UDC G22-34G-21 : 543-82 




© Copyright ir>86 

INDIAN STANDARDS INSTITUTION 
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAA MARG 

NEW DELHI 110002 

Grl Jttty 1986 



IS : 2000 ( Part 1 ) - 1985 

Indian Standard 

METHODS OF 
CHEMICAL ANALYSIS OF BAUXITE 

PART 1 DETERMINATION OF LOSS ON IGNITION 

( First Revision ) 



Methods of Chemical Analysis of Ores, Minerals and Refractories 
Sectional Committee, SMDC 35 

Chairman Representing 

Dr L. P. Pandey National Metallurgical Laboratory ( CSIR ), 

Jamshedpur 

Members 

Dr V. M. Chowdhury ( Alternate to 
Dr L. P. Pandey ) 
Shri G. M. Afpa Rao Steel Authority of India Ltd ( Bhilai Steel Plant ), 

Bhilai 
Shri C. L. Sharma ( Alternate ) 
Shri J. Bakerjee Steel Authority of India Ltd ( Durgapur Steel 

Plant ), Durgapur 
Shri A. G. Mallick ( Alternate ) 
Shri S. V. Bhagwat Khandelwal Ferro Alloys Ltd, Khandelwal Nagar 

Shri D. N. Gupta ( Alternate ) 
Shri P. Bhattacharya Belpahar Refractories Ltd, Belpahar 

Shri P. V, Rao ( Alternate ) 
Shri P. K. Ghosal Kumardhubi Fireclay and Silica Works Ltd, 

Kumardhubi 
Shri L. N. Banerjee ( Alternate ) 
Shri N. B. Gude Ghowgule & Go Pvt Ltd, Marmugao Harbour 

Shri S. S, Honavar Italab Pvt Ltd, Madras 

Shri M. V. Dahholkar ( Alternate I ) 
Shri J. C. Dey ( Alternate II ) 
Dr G. S. P. Iyer Chairman, SMDC 2 ( Bhabha Atomic Research 

Centre, Bombay ) 
Shri J. R. K. Murthy Harry Refractories & Ceramic Works Pvt Ltd*, 

Calcutta 
Shri N. G. Saha ( Alternate ) 
Dr A. Purusottam Geological Survey of India, Calcutta. 

Shri M. Rae National Test House, Calcutta 

Shri A. K. Dutta Gupta ( Alternate ) 

( Continued on page 2 ) 



© Copyright 1986 

INDIAN STANDARDS INSTITUTION 

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) anO 
reproduction in whole or in part by any means except with written permission of the 
publisher shall be deemed to be an infringement of copyright under the said Act. 



IS : 2000 ( Part 1 ) - 1985 

( Continued from page 1 ) 

Members Representing 

Dr J> Rajaram Essen & Co, Bangalore 

Shut K. Rama Krishna ( Alternate ) 
Shri G. Raja Rao Ferro Alloys Corporation Ltd, Shreeramnagar 

Shri D. V. Raman National Mineral Development Corporation Ltd, 

Hyderabad 

Shri N. Vekkatraman ( Alternate ) 
Shri K. Syamala Rao Mineral Exploration Corporation Ltd, Nagpur 

Dr B. C. SiNiiA Central Glass & Ceramic Research Institute 

( CGCRI ), Calcutta 

Shri S. Das Gupta ( Alternate ) 
Dr Y; P. Suivastava The Tata Iron & Steel Co Ltd, Jamshedpur 

Dr K. S. R. Krishnaiah ( Alternate ) 
Shri B. N. Tikoo Department of Atomic Energy, Hyderabad 

Dr Ch Venkateswarlu Chairman, SMDC 34 ( Bhabha Atomic Research 

Centre, Bombay ) 
Shri K. Raghavendran, Director General, ISI ( Ex-ojficio Member ) 



Director ( Struc & Met ) 



Secretaries 

Shri Jagmohan Singh 
Deputy Director ( Metals ), ISI 

Shri M. L. Sharma 
Assistant Director ( Metals ), ISI 



IS : 2000 ( Part 1 ) - 1985 

Indian Standard 

METHODS OF 
CHEMICAL ANALYSIS OF BAUXITE 

PART 1 DETERMINATION OF LOSS ON IGNITION 

( First Revision ) 

0- FOREWORD 

0,1 This Indian Standard ( Part 1 ) ( First Revision ) was adopted by 
the Indian Standards Institution on 24 December 1985, after the draft 
finalized by the Methods of Chemical Analysis of Ores, Minerals and 
Refractories Sectional Committee had been approved by the Structural 
and Metals Division Council. 

0.2 IS : 2000-1962* which covered determination of loss on ignition; 
total silica, non-reactive and reactive silica; alumina; ferric oxide by 
dichromate method, permanganate and colorimetric methods; titania by 
reduction ( volumetric ) and colorimetric methods; phosphorus; calcium 
oxide; magnesium oxide and manganous oxide was first published in 
1962. While reviewing this standard the Sectional Committee felt the 
need for the revision of this standard. On the basis of experience gained 
during these years, the Committee decided to revise this standard into 
different parts covering determination of each element in separate part, 
which on publication would supersede that element given in IS : 2000- 
1962*. This part covers determination on loss of ignition. The other 
parts are: 

Part 2 Determination of silica ( as Si02, 0*5 to 10*0 percent ) 

Part 3 Determination of alumina 

Part 4 Determination of ferric oxide 

Part 5 Determination of titania ( 0*5 to 12'0 percent ) 

Part 6 Determination of vanadium (V < 01 percent ) 

Part 7 Determination of phosphorus pentoxide ( P20 5 < 0*5 

percent ) 

Part 8 Determination of manganous oxide ( MnO < 0*5 percent) 
The procedures for determination of CaO and MgO in bauxite are 
at present under investigation and will be given in subsequent part. 



♦Methods of chemical analysis of bauxite, 

3 



IS : 2000 ( Part 1 ) - 1985 

0.3 In preparation of this revision due consideration has been given to 
the facilities available in the country to carry out such analysis. 

0.4 In reporting the results of a test or analysis made in accordance 
with this standard, if the final value, observed or calculated, is to be 
rounded off, it shall be done in accordance with IS : 2-1960*. 



1. SCOPE 

1.1 This standard ( Part 1 ) prescribes method for determination of loss 
on ignition in bauxite. 

2. SAMPLING 

2.1 Laboratory Sample — Use a truly representative and homogenous 
sample drawn in accordance with IS : 1999-1962f. Grind sufficient 
quantity of this sample as required for analysis in an agate mortar. 

2.2 Test Sample — Grind 5 to 10 g of the laboratory sample, as given 
in 2.2.1 to pass 150 jam IS sieve [ see IS : 460 ( Part 1 )-1985t ■']. Dry to 
constant mass at 110 ± 2°C and use it for the purpose of chemical 
analysis. 

2.2.1 Prepare at least 5 times as much sample as is needed, and make 
sure that all the powder is included; it is not admissible to take only the 
powder that passes through the sieve the first time. Mix well by rolling 
on a sheet of glazed paper, rubber or oil-cloth. 

2.2.2 Lift a corner of the sheet and draw across, low down, in such a 
way that the material is made to roll over and over and does not merely 
slide along. Roll the sample back and forth along each diagonal for 
100 times or more. Spread out the sample into squares and take a little 
from each square. Finally mix the sample chosen. 

Note — Care should be taken as not to grind the sample too much in one time. 
Too frequent sifting through silk bolting cloth should be avoided in order to prevent 
contamination of the sample by abrasion and also loss of moisture due to the heat of 
grinding. 

3. QUALITY OF REAGENTS 

3*1 Unless specified otherwise, analytical grade reagents and distilled 
water shall be employed in the test. 



♦Rules for rounding off numerical values ( revised ). 

tMethods of sampling bauxite. 

^Specification for test sieves: Part 1 Wire cloth tfst sieves ( third revision ). 



IS : 2000 ( Part 1 ) - 1985 

4. DETERMINATION OF LOSS ON IGNITION 

4.1 Reagent 

4.1.1 Magnesium Per chlorate ( Anhydrous ) — solid. 

4.2 Procedure — Weigh accurately 1*00 g of sample ( see 2.2 ) into a 
previously weighed platinum crucible. Heat slowly first, then at a 
gradually increasing temperature. Finally ignite at 1 000 C C for one hour. 
Cool in a desiccator containing preferably magnesium perchlorate and 
weigh. Repeat the heating till constant weight. 

4.3 Calculation 

Loss on ignition — — ^ — X 100 

where 

A -- initial mass in g of the crucible with sample, 

B = final mass in g of crucible with residue after ignition, and 

C — mass in g of the sample taken. 



INTERNATIONAL SYSTEM OF UNITS ( SI UNITS) 

Base Units 

Unit 



Quantity 

Length 

Mass 

Time 

Electric current 

Thermodynamic 
temperature 

Luminous intensity 

Amount of substance 

Supplementary Units 

Quantity 

Plane angle 
Solid angle 

Derived Units 

Quantity 

Force 

Energy 

Power 

Flux 

Flux density 

Frequency 

Electric conductance 

Electromotive force 

Pressure, stress 



Symbol 



metre 


rn 


kilogram 


kg 


second 


S 


ampere 


A 


kelvin 


K 


candela 


cd 


mole 


mol 


Unit 


Symbol 


radian 


rad 


steradian 


sr 



Unit 

newton 

joule 

watt 

weber 

tesla 

hertz 

Siemens 

volt 

pascal 



Symbol 

N 

J 
W 

Wb 

T 

Hz 

S 

V 

Pa 



Definition 

1 N = 1 kg.m/s 2 
1 J = \ N.m 
i W = 1 J/s 
IWb = l V.s 
1 T = 1 Wb/m* 
lHz-1 c/s (s" 1 ) 
1 S = 1 A/V 
1 V = 1 W/A 
1 Pa- 1 N'm 1 




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